Most of the successful DJs I've met have had an exaggerated sense of their own importance. There's something about opening a fader and talking to nobody that attracts the unstable.
Kevin Greening, whose death at 44 was announced today, was at GLR when I used to do a weekly show and he was different - he was modest to a fault. So modest, indeed, that he was fitted into an extraordinary range of slots - from newsman on GLR through desk-driver for Zoe Ball at Radio One to safe pair of hands at every station from Five Live to Smooth FM. His own career somehow got lost in his professionalism.
Anyway, everybody who knew him liked him, which is rare anywhere. In the media it's almost unknown.